package com.NetSunWeiQin.chapter03.multithread1;

import java.io.*;
import java.net.*;



public class SingleThreadEchoServer {
    private int port = 8000;
    private ServerSocket serverSocket;

    public SingleThreadEchoServer() throws IOException {
        serverSocket = new ServerSocket(port);
        System.out.println("  INFO server started......");
    }

    public void service() {
        int  count = 1 ;
        while (true) {
            Socket socket ;

            try {
                socket = serverSocket.accept();   //监听, 开始获取 socket
                Thread workThread = new Thread(new Handler(socket) ,   "线程" + count + "号");
                workThread.start();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String args[]) throws IOException {
        new SingleThreadEchoServer().service();
    }
}

class Handler implements Runnable {
    private Socket socket;

    public Handler(Socket socket) {
        this.socket = socket;
    }

    private PrintWriter getWriter(Socket socket) throws IOException {
        OutputStream socketOut = socket.getOutputStream();
        return new PrintWriter(socketOut, true);
    }

    private BufferedReader getReader(Socket socket) throws IOException {
        InputStream socketIn = socket.getInputStream();
        return new BufferedReader(new InputStreamReader(socketIn));
    }

    public String echo(String msg) {
        return "echo:" + msg;
    }

    public void run() {
        try {

            System.out.println(   " INFO   New connection accepted " + socket.getInetAddress() + ":" + socket.getPort());
            System.out.println(Thread.currentThread().getName() +  " handle  this .....  " );
            BufferedReader br = getReader(socket);
            PrintWriter pw = getWriter(socket);

            String msg ;
            while ((msg = br.readLine()) != null) {
                System.out.println("from " + socket.getInetAddress() + ":" + socket.getPort() + ">" + msg);
                pw.println(echo(msg));
                if (msg.equals("bye"))
                    break;
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (socket != null) socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

